Wrong file name for SR training dataset in wikibrain-sr/resources

For some SR training dataset, the file names are wrong. For example, **atlasify195zh6.csv** should be **tsv** since it's tab separated. This should be changed both in the `wikibrain-sr/src/main/resources/datasets` and `wikibrain-sr/src/main/resources/datasets/info.tsv`

Ditto for other files 
